Radio static eliminator



Oct. 21, 1930. D. E. EMERSON I 1,779 359 RADIO STATIC ELIMINA'IYOR Fil ed June 29, 1929 amen 01, DONALD E. EMERSON alkozmq Patented Oct. 21, 1930 V DONALD E. EMERSON, on srr-AUL, MINNESOTA 'RADIO STATIC ELIMINATOR v Application filed June 29,

static eliminator embodying a hard rubber tube or other tube made of insulating material filled with soft wax or the like and through which extends a conductor wire connected tocaps carried by the opposite ends of the tube, the. caps carrying means for connecting the tube to a suitable panel and for receiving the lead-in wire from the antenna or aerial and the wire leading to the aerial post of the receiving set, the soft wax or other like material tending to absorb and eliminate the static picked up by the aerial or antenna. 1

A further object of my invention is to provide a device of this character which also constitutes a convenient means for attaching H the ground and aerial wires to the set, the device being adapted to be secured to the window sill and has means associated therewith for permitting the ground and antenna wires to be connected therewith,whereby the hook-up wires for the ground and aerial posts of the set can be readily 0011-" 'nected with the panel. V

A still further object of my invention is to provide a static eliminator for radio receiving sets of the above character, which will be durable and efficient in use, one that V willbe simple and easy to manufacture, and

one which. can be placed upon the market at a reasonable cost. a

With these and other objects in view, the

invention consists int-he novel construction,

[arrangement and formation of parts,as will 1 be hereinafter more. specifically described,

claimed, and illustrated in the acco1npany ing drawing, in which. drawingz. V V Figure 1 is a' front elevation of my improved static eliminatorv; t

Figure 2 is ahorizontal section through v 1929. Serial No. 374,654.

the same taken on theline 22 of Figure 1 looking in the directionof the arrows; Figure 3 is a transverse section through the improved device taken on the line 33 of Figure 1; v

I Figure 4; is a detail. view of the tubevand associateparts removed from the panel and thevarious parts in their, disconnected condition. V Referring to the drawing, in detail, wherein similar reference characters designate cor: responding parts. throughout the several views,-the letter generally indicates my improved device, vwhich comprises a'panel V 5, which can be formed of bakelite or other non-electric-conductingmaterial. The-panel 5 may be-provided with suitable openings adjacent to the opposite ends thereoffor the reception offastening screws 6 whereby the panelcan be conveniently secured in place at the desired point, either directly to the I woodwork of the receiving set or to a window sill adjacentto the lead-in wire from the antenna and the ground wire.

Arranged longitudinally on one face of the panel 5 is the novel static eliminatorper se which comprises a barrel or tube 7 ;preferably formed of hard rubben hakelite or the like,-and the op t site ends oflthis tube or barrel- 7 areprovided with internal threadsi for the reception ofmetalli'cend caps 8 and c 9. These caps can be formed of electric'con ducting material and are each provided with a threaded bore 10 for-"thefreception of the end connector plugs ll which have formed 5 thereon binding post lugs 12.: The plugs 11 are provided with relatively short internally threaded'bores13 for the reception of the threaded ends of a metal relectric conductor rod lfwhich as shown extends longitudinal- 93 ly' throughthe barrel in spaced relation to theinnersurfacefthereof. The lugs 12 are 'apertured for thereception of the threaded shanks 15 of fastening-members .16 which can be anchored or secured inithe-front face of the panel -5 in anydesiredway. The threaded shanks 15 oft-he fastening elements 16 form binding posts for the reception of the aerial lead-in .wire 16 and the connector wire 17Which leadst'o theaerial bindingposton the radio set. The barrel or tube 7 is adapted to be filled with soft wax or similar material 18 which material functions to absorb the static or other objectionable noises picked up by the antenna and it is to be noted that the radio waves pass through the center of the wax by means of the rod 14.

The panel 5, below the barrel or tube 7, has secured thereto a binding post 20 which provides a convenient means for permitting the ground wire 21 leading from the outside of the building to be connected to the panel and the connector wire 22 leading to the ground post on the set to be connected to the panel. Thus the entire device constitutes a convenient connection panel to facilitate the connecting of the various wires to a radio receiving set.

If desired, the tube or barrel 7 and its associate parts can be made standard equipment on a radio receiving set and thus connected directly with the set either in front of or in rear of the conventional aerial binding post on the set.

Changes in details may be made without departing from the spirit or the scope of this invention, but: I

What I claimas new is:

1. A static eliminator for radio receiving sets comprising a barrel formed of insulating material, heads formed of electric conducting material secured to the opposite ends of the barrel, a conductor rod extending axially through the barrel and electrically connected with said heads, soft Wax in said barrel surrounding the conductorrod, and means for connecting a lead-in wire from an aerial and a connector wire leading to the binding aerial post of the radio receiving set to the opposite ends of the heads.

2. A static eliminator for radio receiving sets comprising a barrel formed of electric insulating material having soft wax therein, an electric conductor rod extending axially through the barrel and embedded in said wax, caps formed of electric conducting material threaded into the opposite ends of the barrel and having sockets therein, plugs threaded into said sockets receiving the opposite ends of the conductor Wire, binding post lugs formed on said plugs, means engaging said lugs for connecting the same to a support, and forming means for permitting the connection of the lead-in wire from the antenna and the connecting Wire for the radio receiving set aerial binding post to be connected therewith.

3. A static eliminator for radio receiving sets comprising a panel formed of insulating material, means for securing the panel to a support, a barrel formed of electric insulating material having a soft wax-like material therein, an electric'con'ductor rod extending axially through the barrel and embedded in said Wax-like material, end caps threaded into the opposite ends of the barrel and having threaded bores, plugs threaded into said bores receiving the opposite ends of the conductor rod, connector apertured lugs formed on the outer ends of the plugs, means for anchoring the lugs to the panel including fastening members embedded in said panel and having threaded shanks extending through the apertures of the lugs, said shanks forming bind ing posts for receiving respectively the aerial lead-in wire and the connector wire extending to the aerial binding post on the radio receiving set, and a third binding post carried by the panel below the barrel for permitting the connection of the ground wire and the connecting ground wire to be connected with the panel.

In testimony whereof I affix my signature.

DONALD E. EMERSON. 

